A device and method for compensating for soil loss in a disturbed area during a steel pipe pile recycling process

Abstract

This invention relates to a device and method for compensating soil loss in disturbed areas during the recovery of steel pipe piles. The device includes a steel pipe pile, a casing assembly circumferentially arranged on the inner wall of the pile, and the casing assembly includes a grouting bag and a ground grouting hose. A bottom-sealing grouting bag is installed at the bottom of the steel pipe pile, and the grouting bag and the bottom-sealing grouting bag are interconnected. The ground grouting hose is fixedly connected to the bottom-sealing grouting bag. This device and method achieve ultra-deep, continuous deployment of the ground grouting hose during the extraction of the steel pipe pile, followed by in-situ compensation grouting reinforcement, solving the problem of large deformation of the surrounding environment caused by strong disturbance and soil loss during the recovery of steel pipe piles. Through the device and method provided by this invention, ground grouting reinforcement and soil loss compensation in the strongly disturbed area around the steel pipe pile can be achieved, thus providing a reliable method for efficient, low-disturbance, and low-impact construction implementation of the steel pipe pile recovery process. The method of this invention is a method for automatically deploying pipes for ground compensation grouting during the extraction of the steel pipe pile.

Description

Technical Field

[0001] This invention belongs to the field of underground engineering technology, and specifically relates to a device and method for compensating for soil loss in the disturbed area during the recycling of steel pipe piles. Background Technology

[0002] In recent years, the steel pipe pile driving technology using a non-resonant hydraulic vibratory hammer has been widely used in soft soil areas due to its advantages such as high construction efficiency, low noise, and low environmental impact, making it a common application in municipal bridge pile foundation projects. With the continuous promotion of low-carbon and green development concepts in the construction industry, the use of the recyclable characteristics of steel pipe piles and the adoption of green and efficient retaining structure systems such as PC method piles based on steel pipe piles are gradually gaining industry recognition.

[0003] However, due to the strong disturbance to the soil caused by vibration and soil squeezing during the pile formation process of non-resonant steel pipe piles, the surrounding soil, especially the soil inside the pipe, has lost some strength. Therefore, the disturbance is more intense during the extraction process, and significant volume loss is also generated. Such repeated strong disturbance process inevitably leads to a significant impact on the deformation of the surrounding environment when the steel pipe pile is recovered. Nearby pipelines, tunnels, existing buildings, etc. are all affected by certain deformation. In particular, under the condition of soil loss, there is a long-term adverse hazard to the underground structure within the retaining structure.

[0004] Currently, the most common practice is to drive in grouting pipes for grouting reinforcement after the steel pipe piles are pulled out. The grouting pipes are also steel pipes. After grouting is completed, most of them are left in the soil. This still cannot meet the requirements of low-carbon construction. At the same time, this construction process is relatively complicated and slow, and single-pipe grouting is difficult to achieve uniform effect.

[0005] Therefore, how to provide a soil loss compensation device in the disturbed area during the steel pipe pile recycling process, and provide a reliable method for efficient, low-disturbance, and low-impact construction implementation of the steel pipe pile recycling process, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention provides a device and method for compensating soil loss in disturbed areas during the recovery of steel pipe piles. Addressing the problem of significant environmental deformation caused by strong disturbance and soil loss during steel pipe pile recovery, this invention proposes a device and method for automatically laying pipes and performing ground compensation grouting during the steel pipe pile extraction process. This achieves ground reinforcement and soil loss compensation in the strongly disturbed area surrounding the steel pipe pile, thus providing a reliable method for efficient, low-disturbance, and low-impact construction implementation during the steel pipe pile recovery process.

[0007] To solve the above technical problems, the present invention includes the following technical solutions:

[0008] A device for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles includes:

[0009] A steel pipe pile, wherein a casing assembly is circumferentially arranged on the inner wall of the steel pipe pile, the casing assembly includes a grouting bag and a stratum grouting hose, a bottom sealing bag and a grouting ring pipe are provided at the bottom of the steel pipe pile, the grouting bag and the bottom sealing bag are interconnected, and the stratum grouting hose is fixedly connected to the grouting ring pipe.

[0010] Furthermore, the grouting hoses are evenly spaced.

[0011] Furthermore, the number of the formation grouting hoses is greater than the number of the bag grouting hoses.

[0012] The present invention provides a method for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles, the method comprising the following steps:

[0013] Step S1: Provide a backup soil loss compensation device for the disturbed area during the steel pipe pile recycling process;

[0014] Step S2: Use a non-resonance hydraulic vibratory hammer to drive steel pipe piles.

[0015] Step S3: Before removing the steel pipe pile, connect the grouting equipment to the grouting bag pipe;

[0016] Step S4: Start the grouting equipment to allow the bottom sealing bag of the steel pipe pile to expand and anchor with the stratum;

[0017] Step S5: Remove the grouting pipe and install a non-resonance hydraulic vibratory hammer on the top of the steel pipe pile;

[0018] Step S6: Start the non-resonance hydraulic vibratory hammer, remove the steel pipe pile, and under the anchoring effect of the bottom sealing bag, the grouting hose connected to the bottom sealing bag gradually slides from the casing into the in-situ stratum of the steel pipe pile; and

[0019] Step S7: After the steel pipe piles are completely removed, connect the grouting equipment to the grouting hose of the stratum, start the compensation grouting, and complete the soil reinforcement and soil loss compensation in the disturbed area.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] This invention provides a soil loss compensation device for disturbed areas during steel pipe pile recovery. The device includes a steel pipe pile, with a casing assembly circumferentially arranged on the inner wall of the pile. The casing assembly includes a grouting bag and a ground grouting hose. A bottom-sealing sump is located at the bottom of the steel pipe pile, and the grouting bag and the bottom-sealing sump are interconnected. The ground grouting hose is fixedly connected to the bottom-sealing sump. This invention solves the problem of large environmental deformation caused by strong disturbance and soil loss during steel pipe pile recovery. The device and method provided by this invention can achieve ground grouting reinforcement and soil loss compensation in the strongly disturbed area surrounding the steel pipe pile, thus providing a reliable method for efficient, low-disturbance, and low-impact construction implementation during steel pipe pile recovery. The method of this invention is a method for automatically laying pipes for ground compensation grouting during the steel pipe pile extraction process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a soil loss compensation device in the disturbed zone during the recycling of steel pipe piles according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 AA section view;

[0024] Figure 3 for Figure 1 BB cross-sectional view;

[0025] Figures 4 to 9 This is a construction flowchart of steps S2 to S7 in the method for compensating for soil loss in the disturbed area during the recycling of steel pipe piles in one embodiment of the present invention.

[0026] In the picture:

[0027] 1-Steel pipe pile, 2-Gasket grouting pipe, 3-Grouting hose for strata, 4-Sealed bag, 5-Resonance-free hydraulic vibratory hammer, 6-Strata, 7-Lifting equipment, 8-Grouting equipment, 9-Gasket grouting ring pipe. Detailed Implementation

[0028] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a device and method for compensating soil loss in the disturbed zone during the recycling of steel pipe piles, as provided by the present invention. The advantages and features of the present invention will become clearer from the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below correspond to the upper and lower directions in the accompanying drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0029] Principle: This invention addresses the significant environmental deformation caused by strong disturbances and soil loss during the recovery of steel pipe piles. It involves installing a series of uniformly arranged circumferential sleeves within the steel pipe pile. Some sleeves contain grouting pipes, while the remaining sleeves contain ground grouting hoses. A sealing bag is installed at the bottom of the steel pipe pile, with the grouting pipes and the sealing bag interconnected. The grouting hoses are fixedly connected to the sealing bag. Before the steel pipe pile is extracted, the sealing bag is first grouted through the grouting pipes to expand it and form an anchoring end. Then, the steel pipe pile is extracted. During this process, the ground grouting hoses inside the steel pipe pile gradually slide along the sleeves. Finally, the entire steel pipe pile is extracted, and the ground grouting hoses are placed at the original location of the steel pipe pile. Compensation grouting is then performed on the ground through the grouting hoses, thereby compensating for and reinforcing the disturbed area and soil loss caused by the steel pipe pile.

[0030] Example 1

[0031] The following is combined Figures 1 to 9 This document details the structural composition of the soil loss compensation device in the disturbed area during the steel pipe pile recycling process.

[0032] A device for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles includes:

[0033] The steel pipe pile 1 has a casing assembly circumferentially arranged on the inner wall of the steel pipe pile 1. The casing assembly includes a grouting bag 2 and a grouting hose 3. A bottom sealing bag 4 and a grouting ring pipe 9 are arranged at the bottom of the steel pipe pile 1. The grouting bag 2 and the bottom sealing bag 4 are interconnected. The grouting hose 3 and the grouting ring pipe 9 are fixedly connected.

[0034] In this embodiment, more preferably, the grouting hoses 3 are evenly spaced.

[0035] In this embodiment, more preferably, the number of formation grouting hoses 3 is greater than the number of bag grouting hoses 2.

[0036] Please continue to refer to this. Figures 1 to 9 The present invention provides a method for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles, the method comprising the following steps:

[0037] Step S1: Provide a backup soil loss compensation device for the disturbed area during the steel pipe pile recycling process;

[0038] Step S2: Use lifting equipment 7 to lift the non-resonance hydraulic vibratory hammer 5 above the steel pipe pile 1 to carry out the pile driving construction of the steel pipe pile 1;

[0039] Step S3: Before removing the steel pipe pile 1, connect the grouting equipment 8 to the bag grouting pipe 2;

[0040] Step S4: Start the grouting equipment 8 to expand the bottom sealing bag 4 of the steel pipe pile 1 and anchor it to the stratum 6;

[0041] Step S5: Remove the grouting pipe and install the non-resonance hydraulic vibratory hammer 5 on the top of the steel pipe pile 1;

[0042] Step S6: Start the non-resonance hydraulic vibratory hammer 5, remove the steel pipe pile 1, and under the anchoring action of the bottom sealing bag 4, the grouting hose 3 connected to the bottom sealing bag 4 gradually slides from the casing into the in-situ stratum of the steel pipe pile 1; and

[0043] Step S7: After the steel pipe pile 1 is completely removed, connect the grouting equipment 8 to the grouting hose 3 in the stratum, start the compensation grouting, and complete the soil reinforcement and soil loss compensation in the disturbed area.

[0044] The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. The above embodiments only illustrate several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles, characterized in that, Includes the following steps: Step S1: Provide a backup soil loss compensation device for the disturbed area during the steel pipe pile recycling process. The soil loss compensation device for the disturbed area during the steel pipe pile recycling process includes: A steel pipe pile, wherein a casing assembly is circumferentially arranged on the inner wall of the steel pipe pile, the casing assembly includes a grouting bag and a stratum grouting hose, a bottom sealing bag and a grouting ring pipe are provided at the bottom of the steel pipe pile, the grouting bag and the bottom sealing bag are interconnected, and the stratum grouting hose is fixedly connected to the grouting ring pipe. Step S2: Use a non-resonance hydraulic vibratory hammer to drive steel pipe piles. Step S3: Before removing the steel pipe pile, connect the grouting equipment to the grouting bag pipe; Step S4: Start the grouting equipment to allow the bottom sealing bag of the steel pipe pile to expand and anchor with the stratum; Step S5: Remove the grouting pipe and install a non-resonance hydraulic vibratory hammer on the top of the steel pipe pile; Step S6: Start the non-resonance hydraulic vibratory hammer, remove the steel pipe pile, and under the anchoring effect of the bottom sealing bag, the grouting hose connected to the bottom sealing bag gradually slides from the casing into the original stratum of the steel pipe pile. Step S7: After the steel pipe piles are completely removed, connect the grouting equipment to the grouting hose of the stratum, start the compensation grouting, and complete the soil reinforcement and soil loss compensation in the disturbed area.

2. The method for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles according to claim 1, characterized in that, The grouting hoses are evenly spaced.

3. The method for compensating for soil loss in the disturbed zone during the recycling of steel pipe piles according to claim 1, characterized in that, The number of formation grouting hoses is greater than the number of bag grouting hoses.

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